when i take off it will not shift.i replace the intake gasket.im thinking its a vacuum.wanted an expect opinionwhen i take off it will not shift.i replace the intake gasket.im thinking its a vacuum.wanted an expect opinion

there is a small hose that goes to a small round valve on the back side of the transmission and is the vacuum supply for the modulator valve,, it was likely plugged into the vacuum tree on the intake manifold, you should be able to hear a slight hiss with the enhine runningthere is a small hose that goes to a small round valve on the back side of the transmission and is the vacuum supply for the modulator valve,, it was likely plugged into the vacuum tree on the intake manifold, you should be able to hear a slight hiss with the enhine running

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Sounds like a problem with the shift interlock.Here's how it works:You put your foot on the brake pedal,the brake pedal switch sends voltage to a solenoid mounted on your shifter.The solenoid unlocks the shifter,and you remove it from Park.When the interlock doesnt work,it's usually the interlock solenoid mounted on the shifter malfunctioning,however the brake pedal switch,or wires to and from can also be at fault.

Its weird but I had a fuse blow out awhile back that is the same fuse that works the cab lights when you open the doors. When this fuse went out it also made it shift odd and hard when it did shift. Since it is only intermittent in your case, It may just be a weak fuse.

most likely your brake switch is out. If you had a scanner you would be able to see if the computer see's you pressing on the pedal. Or if you know how to test you could check to see if it switches ( completes the circuit ).

99 Expedition has an electronic shifter on the tranny, so only way i know is take it to a tranny shop, sorry, call junk yards and see what the cost is for the electronic shifter but thinks they wont sell seperate from tranny. good luck, probably a dealer part which is Too Fllipping much for anyuthing from Dealers they are a total rip off shop! True story

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The shifter needs to be inspected.If the gears are shifted automatically.The shifter assembly is got misaligned,it has to be open and realign.

There are many other possibilities.But if it was working right up till now and suddenly this auto shifting occurred then its shifter assembly realign issue.Also i suggest you to refer these gear shift issues,which are mostly noticed.These are direct links with appropriate solutions to the specific problems of gear ****.Click the link below:------

the first problem was the truck wouldn't start. replaced the starter, nothing. replaced the battery and solenoid, nothing. had to touch the starter wire to the battery and got the engine to start. so it looks as though something in the ignition maybe the problem. once i have the truck started i can shift into reverse from park and that's it. i can't shift it into neutral or drive. was hoping to hear it is the ignition switch i need to replace and i don't want to hear its the transmission. please help! thank you.

Had the transmission serviced in a while? would be a good idea to have someone look at it for you. I wouldn't continue to drive it until you do a diagnostic and have it properly serviced. Transmissions on that truck could cost you upwards of $7,500. and I think you would prefer spending the $ 350. it would cost for a servicing.